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planner: make var_samp can be used as a window function (#53130) #53286

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Merged
merged 1 commit into from
Nov 11, 2024
Merged

planner: make var_samp can be used as a window function (#53130) #53286

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9 changes: 9 additions & 0 deletions executor/window_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -498,3 +498,12 @@ func TestIssue29947(t *testing.T) {
result.Check(testkit.Rows("2", "3"))
tk.MustExec("commit")
}

func TestVarSampAsAWindowFunction(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create table t1 (c1 int)")
tk.MustExec("select var_samp(c1) from t1")
tk.MustExec("select c1, var_samp(c1) over (partition by c1) from t1")
}
6 changes: 5 additions & 1 deletion parser/parser.go
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6 changes: 5 additions & 1 deletion parser/parser.y
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Original file line number Diff line number Diff line change
Expand Up @@ -8132,7 +8132,11 @@ SumExpr:
}
| builtinVarSamp '(' BuggyDefaultFalseDistinctOpt Expression ')' OptWindowingClause
{
$$ = &ast.AggregateFuncExpr{F: $1, Args: []ast.ExprNode{$4}, Distinct: $3.(bool)}
if $6 != nil {
$$ = &ast.WindowFuncExpr{F: $1, Args: []ast.ExprNode{$4}, Distinct: $3.(bool), Spec: *($6.(*ast.WindowSpec))}
} else {
$$ = &ast.AggregateFuncExpr{F: $1, Args: []ast.ExprNode{$4}, Distinct: $3.(bool)}
}
}
| "JSON_ARRAYAGG" '(' Expression ')' OptWindowingClause
{
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